What are the best email providers for sending bulk emails over 500 emails per day?

For sending over 500 emails daily, you need to switch from regular email services like Google Workspace (which has limitations of approximately 750 emails per day) to specialized email providers. These providers come in three categories: basic providers like Mailchimp for simple newsletters and list management, automation-focused providers like HubSpot and Infusionsoft for creating email sequences and triggered workflows, and enterprise providers for high-volume sending (15,000+ emails daily). Enterprise providers offer essential features for mass emailing, including rotating IP addresses, dedicated IPs, and advanced deliverability tools to ensure emails reach recipients' inboxes. These platforms also manage critical compliance aspects like unsubscribe handling and spam reporting, which are necessary when sending commercial emails at scale.